Sockets, design recommendations

These days most households have lots of domestic appliances and electronic equipment, so how many sockets should be installed Ultimately this is a matter for the customer and the electrical designer but most consumer organizations, the house builders NHBC and the Royal Society for the Prevention of Accidents (ROSPA) make the following general recommendations ... 

The reverse shoulder concept was first developed and implanted in Europe by Professor Paul Grammont in 1985 to allow treatment of patients with rotator cuff tear arthropathy [50]. Initial versions included a relatively constrained articulation between the ball and socket and were largely unsuccessful because of loosening [51]. In 1987, Grammont and Baulot designed a semiconstrained reverse prosthesis and recommended it be used prudently and in patients older than 70 years of age [51]. After years of use in Europe, the first reverse prosthesis case was done in North America in February 2003 [52]. In November 2003, the FDA first cleared a reverse prosthesis design for sale in the United States, and the first United States case was done in March 2004 [38]. 

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